Toyota LEXUS LS430 2005 Manual page 244

Recalling the memorized position
16L302a
Keep pressing the "M" button until a beep sounds; the
rear seat and rear head restraint positions will be
automatically adjusted to the memorized position.
If the "M" switch is pushed while the memorized position profile
is being activated, the operation will stop.
Do not place anything under the rear seat as this might
interfere with seat movement.
OCCUPANT RESTRAINT SYSTEMS
Door opening linked seat sliding function
The rear seat automatically moves backward when the
rear door is opened if the seat is adjusted to a forward
position.
The ignition switch must be in the "ON" position.
This function is actuated when the selector lever is set in the
"P" position or if the vehicle is stopped with the brake pedal
depressed.
While the seat is being moved by this function, the operation
will not stop even if the door is closed midway.
16L328a
To cancel this function, push the "C" button.
The indicator light comes on.
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